You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
153 lines
6.4 KiB
153 lines
6.4 KiB
# Licensed to the Apache Software Foundation (ASF) under one or more |
|
# contributor license agreements. See the NOTICE file distributed with |
|
# this work for additional information regarding copyright ownership. |
|
# The ASF licenses this file to You under the Apache License, Version 2.0 |
|
# (the "License"); you may not use this file except in compliance with |
|
# the License. You may obtain a copy of the License at |
|
# |
|
# http://www.apache.org/licenses/LICENSE-2.0 |
|
# |
|
# Unless required by applicable law or agreed to in writing, software |
|
# distributed under the License is distributed on an "AS IS" BASIS, |
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
# See the License for the specific language governing permissions and |
|
# limitations under the License. |
|
|
|
import json |
|
import os.path |
|
|
|
from ducktape.services.service import Service |
|
from ducktape.utils import util |
|
|
|
|
|
class KiboshService(Service): |
|
""" |
|
Kibosh is a fault-injecting FUSE filesystem. |
|
|
|
Attributes: |
|
INSTALL_ROOT The path of where Kibosh is installed. |
|
BINARY_NAME The Kibosh binary name. |
|
BINARY_PATH The path to the kibosh binary. |
|
""" |
|
INSTALL_ROOT = "/opt/kibosh/build" |
|
BINARY_NAME = "kibosh" |
|
BINARY_PATH = os.path.join(INSTALL_ROOT, BINARY_NAME) |
|
|
|
def __init__(self, context, nodes, target, mirror, persist="/mnt/kibosh"): |
|
""" |
|
Create a Kibosh service. |
|
|
|
:param context: The TestContext object. |
|
:param nodes: The nodes to put the Kibosh FS on. Kibosh allocates no |
|
nodes of its own. |
|
:param target: The target directory, which Kibosh exports a view of. |
|
:param mirror: The mirror directory, where Kibosh injects faults. |
|
:param persist: Where the log files and pid files will be created. |
|
""" |
|
Service.__init__(self, context, num_nodes=0) |
|
if (len(nodes) == 0): |
|
raise RuntimeError("You must supply at least one node to run the service on.") |
|
for node in nodes: |
|
self.nodes.append(node) |
|
|
|
self.target = target |
|
self.mirror = mirror |
|
self.persist = persist |
|
|
|
self.control_path = os.path.join(self.mirror, "kibosh_control") |
|
self.pidfile_path = os.path.join(self.persist, "pidfile") |
|
self.stdout_stderr_path = os.path.join(self.persist, "kibosh-stdout-stderr.log") |
|
self.log_path = os.path.join(self.persist, "kibosh.log") |
|
self.logs = { |
|
"kibosh-stdout-stderr.log": { |
|
"path": self.stdout_stderr_path, |
|
"collect_default": True}, |
|
"kibosh.log": { |
|
"path": self.log_path, |
|
"collect_default": True} |
|
} |
|
|
|
def free(self): |
|
"""Clear the nodes list.""" |
|
# Because the filesystem runs on nodes which have been allocated by other services, those nodes |
|
# are not deallocated here. |
|
self.nodes = [] |
|
Service.free(self) |
|
|
|
def kibosh_running(self, node): |
|
return 0 == node.account.ssh("test -e '%s'" % self.control_path, allow_fail=True) |
|
|
|
def start_node(self, node): |
|
node.account.mkdirs(self.persist) |
|
cmd = "sudo -E " |
|
cmd += " %s" % KiboshService.BINARY_PATH |
|
cmd += " --target %s" % self.target |
|
cmd += " --pidfile %s" % self.pidfile_path |
|
cmd += " --log %s" % self.log_path |
|
cmd += " --control-mode 666" |
|
cmd += " --verbose" |
|
cmd += " %s" % self.mirror |
|
cmd += " &> %s" % self.stdout_stderr_path |
|
node.account.ssh(cmd) |
|
util.wait_until(lambda: self.kibosh_running(node), 20, backoff_sec=.1, |
|
err_msg="Timed out waiting for kibosh to start on %s" % node.account.hostname) |
|
|
|
def pids(self, node): |
|
return [pid for pid in node.account.ssh_capture("test -e '%s' && test -e /proc/$(cat '%s')" % |
|
(self.pidfile_path, self.pidfile_path), allow_fail=True)] |
|
|
|
def wait_node(self, node, timeout_sec=None): |
|
return len(self.pids(node)) == 0 |
|
|
|
def kibosh_process_running(self, node): |
|
pids = self.pids(node) |
|
if len(pids) == 0: |
|
return True |
|
return False |
|
|
|
def stop_node(self, node): |
|
"""Halt kibosh process(es) on this node.""" |
|
node.account.logger.debug("stop_node(%s): unmounting %s" % (node.name, self.mirror)) |
|
node.account.ssh("sudo fusermount -u %s" % self.mirror, allow_fail=True) |
|
# Wait for the kibosh process to terminate. |
|
try: |
|
util.wait_until(lambda: self.kibosh_process_running(node), 20, backoff_sec=.1, |
|
err_msg="Timed out waiting for kibosh to stop on %s" % node.account.hostname) |
|
except TimeoutError: |
|
# If the process won't terminate, use kill -9 to shut it down. |
|
node.account.logger.debug("stop_node(%s): killing the kibosh process managing %s" % (node.name, self.mirror)) |
|
node.account.ssh("sudo kill -9 %s" % (" ".join(self.pids(node))), allow_fail=True) |
|
node.account.ssh("sudo fusermount -u %s" % self.mirror) |
|
util.wait_until(lambda: self.kibosh_process_running(node), 20, backoff_sec=.1, |
|
err_msg="Timed out waiting for kibosh to stop on %s" % node.account.hostname) |
|
|
|
def clean_node(self, node): |
|
"""Clean up persistent state on this node - e.g. service logs, configuration files etc.""" |
|
self.stop_node(node) |
|
node.account.ssh("rm -rf -- %s" % self.persist) |
|
|
|
def set_faults(self, node, specs): |
|
""" |
|
Set the currently active faults. |
|
|
|
:param node: The node. |
|
:param spec: An array of FaultSpec objects describing the faults. |
|
""" |
|
fault_array = [spec.kibosh_message() for spec in specs] |
|
obj = { 'faults': fault_array } |
|
obj_json = json.dumps(obj) |
|
node.account.create_file(self.control_path, obj_json) |
|
|
|
def get_fault_json(self, node): |
|
""" |
|
Return a JSON string which contains the currently active faults. |
|
|
|
:param node: The node. |
|
|
|
:returns: The fault JSON describing the faults. |
|
""" |
|
iter = node.account.ssh_capture("cat '%s'" % self.control_path) |
|
text = "" |
|
for line in iter: |
|
text = "%s%s" % (text, line.rstrip("\r\n")) |
|
return text
|
|
|